Which are descriptions of gravity on Earth? Check all that apply.
an attractive force
a repulsive force
a noncontact force
a contact force
a horizontal force
a vertical force

Respuesta :

Gravitational force is a NON-CONTACT FORCE. Gravitational force acts on all bodies on the earth that have mass. The force which is exerted through weight acts on the center of gravity of the body. The force is directed towards the center of the earth. The weight of a body is the gravitational force exerted by the earth on the body.

The gravity is described by an attractive force, non-contact force and vertical force. Thus, options (a), (c) and (f) are correct.

The gravity is an attractive force that acts between the objects or particles kept on the of Earth and the Earth itself. The force is proportional to the product of masses of particles/objects and Earth. Since, the earth carry more mass, therefore, all objects are attracted towards the centre of Earth.

  • Gravity is an attractive force, where all the matters of Earth are attracted towards the Earth.
  • Gravity cannot be repulsive on Earth, because earth is very heavy comparing to objects in the Earth. Thus, the repulsive force does not describe the gravity.
  • Gravity do need the exact contact between the Earth surface and object. For example: A ball thrown in air is pulled towards the Earth due to gravity. Thus, gravitational force or gravity is a non-contact force.
  • As discussed above, the gravitational force is non-contact force, therefore it cannot be contact force.
  • Gravitational force or gravity always has its influence towards the downward direction rather than horizontal direction. Therefore, the horizontal force does not describe the gravity.
  • As per above discussion, the gravity has downward influence. Therefore, it is a vertical force.

Thus, we can conclude that gravity is described by an attractive force, non-contact force and vertical force.

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